Switching apparatus



July 17, 1923. 1,461,942

.W. M. SCCBTT SWITCHING APPARATUS v Filed may 21 1920 5 sheets-sheet 1INVENTOR.

4 ATTORNEY July 17, 1923. 1,461,942

. W. M. SCOTT SWITCHING APPARATUS Filed May 21 1920 5 Shoets-Shee t 2 INVEN TOR. 6

BY ammfi (53% 1 ATTORNEY 5 Sheets-Sheet 3 W: 7 M W 4 W w, m MM 5 July17, 1923.

W. M. SCOTT SWITCHING APPARATUS Filed May 21 1920 51 ATTORNEY PatentedJuly 17, 1923.

UNITED STATES WILLIAM SCOTT, OF .TREDYFFRIN TOWNSHIP, CHESTER COUNTY,PENNSYLVANIA.

SWITCHING APPARATUS.

Application filed May 21, 1920. Serial No. 383,031.

To all whom it may concern:

Be it known that I, WILLIAM M. Soon, a citizen of the United States,residing in Tredyifrin Township, in the county of Chester and State ofPenns lvania, have invented a new and useful Witching Apparatus, ofwhich the following is a specification.

My invention relates to automatic switch or circuit breaker structure ofthe so-called non-closable type of which it is characteristic that anactuating member is controlled, as to its engagement or coaction withthe movable switch structure, by a latch or equivalent under control ofthe electro-responsive means, as a tripping magnet responsive topredetermined electrical condition during existence or continuance ofwhichthe switch cannot be closed because of actuation or control of thelatch or. equivalent.

My invention resides in switch or circuit breaker structure of thecharacter referred to having novel features of construction relatingmore particularly to the actuating means and the latch connection withthe movable switch member.

My invention resides in switch or circuit breaker structure of thecharacter referred to in comb nation with an enclosed housing, withoperating and tripping means operable from the exterior of the housing.

My invention resides in features of structure and combinationhereinafter described and claimed.

For an illustration of one of various forms my invention may take,reference is which:

Fig. 1 is a side elevational view of the switch mechanism with parts ofthe housing structure in section.

Fig. 2 is a front elevational view ofthe structure illustrated in Fig.1, with the door or front wall of the housing removed.

Fig. 3 is a fragmentary side elevational view, on enlarged scale,illustrating the operating and tripping mechanism.

Fig. 4 is a front elevational view of part of the structure shown inFig. 3.

Figs. 5 and 5 are top plan and side elevational views, respectively. ofstructure for limiting the movement of the operating member.

Figs. 6 and 6" are side elevational and plan views, respectively, ofmembers comprised in the switch operating mechanism.

Figs. 7 and 7 are plan and side elevational views, respectively, of amember comprised in the latch actuatingmechanism.

Figs. 8, 8 and 8 are plan, side elevational and end views, respectively,of an operating member.

Figs. 9 and 9 are front and edge views, respectively, of stop structure.

Figs. 10 and 10" are side and edge views, respectively, of a membercomprised in the latching and operating mechanism.

Figs. 11 and 11 are side and edge views, respectively, of a co-actinglatching and operating mechanism.

Figs. 12 and 12 are side and end views, respectively, of housing orbracket structure.

Fig. 13 is a side elevational view of the switch restraining latch.

Referring to the drawings, Figs. 1 and 2, upon a base 1, preferably ofslate or other suitable insulating material, are secured the threesimilar switches A, B and C, each controlling one pole of a three-wiredirect current system, three phase or three wire alternating currentsystem, or the like, it being understood, however, that as to manyaspects of my invention the number of switches is of no import.

The switches are in general similar, and a description of one willsuflice for all. Each comprises main terminal blocks 2 and 3 securedupon the base 1. The upper terminal blocks.2 are held to the base andelectrically communicate with the studs 4, extending to the rear of thebase 1 within the box or housing 5 to which'the base 1 is secured and bywhich the base 1 and the parts carried thereby are secured to anysuitable support, as a wall, pillar or the like.

Through the conduit or pipe 6 extend the insulated conductors 7, 8 and 9constitutin service or supply conductors and communlcating,respectively, with the studs 4 of the switches A, B and C.

The lower terminals 3 of switches A and C connect by conductors 10, 10with terminals of the electro-magnet windings 11, 11, whose otherterminals connect, respectively, by conductors 12, 12 with the studs 13,13 connecting, respectively, with conductors 14, 14. The lower terminalblock 3 of the middle switch B is held to the base by and connects withthe stud 15, with which connects the v of each switch is the laminatedbridging member 18 carried by the arm 19 pivoted at 20 to the bracket orhousing 21 carried by the base 1. At 22 the arm 19 is pivoted to themember 23, to which latter there is pivoted at 24 the link 25, pivotedto the base or other stationary member at 26, the link 25 and member 23forming a toggle structure which is under travelled when the switch isin the circuit closing position indicated in Fig. 1. The members 23 ofthe three switches are positively mechanically connected to each otherby the bar 23 The switches are locked in circuit closing position by thelatch 27, pivoted at 20 and engaging and holdin the pin 28 carried bythe member 23 of mi dle switch B, andhaving the tail 27, Fig. 13,adapted to be engaged by the latch actuator hereinafter referred to.

Pivoted concentrically with the latch 27 at 20 is the latch actuator 29,comprising, as shown in Fig. 7, two members connected by the cross piece30, one of the members having pivoted thereto at 31 the roller orequivalent member 32, preferably of fibre or other suitable insulatingmaterial, the cross piece 30 being positioned to engage the tail 27 ofthe latch 27. The latch actuator 29 has tails 29 adapted to be engagedand actuated by the clips or lugs 33 carried by the transverselyextending tripper bar structure 34 carried by brackets 35 pivoted to thebase 1 at 38; "a

Associated with each magnet winding 11 is a core having pole pieces 36,with which cooperates the armature 37 pivoted at 38. Pivoted to eacharmature 37 at 39 is the downwardly extended rod 40 having pivoted at 41at its lower end the sucker element 42 coacting in well known mannerwith the bottom of the chamber 43 suitably moistened by oil or the liketo produce a start-delaying device when the armature 37 is attractedupwardly by the magnet pole pieces.

Secured to the cross bar'23 are the two bracket members 44, to which arepivoted by the ivot pin 45 the ends 46, Fig. 4, ofa rod or ink 47pivoted at its lower end at 48 to the bar or lever 49 pivoted at 50 andrigidly attached by cross piece 51 to the offset member 52, Fig. 6,which is also concentrically pivoted upon the pivot pin 50 carried bythe bracket or housing 53 secured upon the base 1. Secured at theforward end of' the bracket 53, Fig.12, is the plate 54 hav- ,aeneaa ingat its upper end the laterally turned lug 55 and at its lower end thelug 56, lug 56 limiting clockwise movement of the arm 49, by engagementof cross piece 51 with lug 56, as viewed in Fig. 3.

Pivoted to the member 52 at 57 is the arm 58, Fig. 10, having the lugs59 and 60. The lug 59 limits counter-clockwise movement of the arm 58with respect to the arm 52, as viewed in Fig. 3, under influence of thetension spring 61 secured at its one end at 62 to the arm 58 and at itsother end at 63 to the arm 52. The free end 64 of the arm 58 is operatedby the latch actuator 29 through the roller 32.

Independently pivoted on the pin 50 is an arm 65, Fig. 11, having theoffset portion 66 having in its lower edge the notch 67 and on theopposite side of the pivot the perture 68. Upon the arm 65 is alaterally "tending lug 69 adapted to engage lug 55 bracket 53 to limitclockwise rotation Qty he arm 65, as viewed in Fig. 3; and on t 1eopposite side is lug 69 to limit movement in opposite side of lug 55. Atits lower end the arm 65 has the latching and engaging or operatingsurface 7 0 adapted to co-act with the transversely extending lug on theaforesaid arm 58.

- Engaging in the notch 67 and aperture 68 in the arm are the lugs 71,71 on the flattened end 72 of the rotatable tubular member 73, Fig. 8,whose axis coincides with the axis of the pivot 50. Through a hole 74 inthe member 73 extends a pin 75 which secures to the member 73 the stopmember 76 and also the pivotal shaft? 7 the member 76 having thelaterally extending lugs 78, 78 adapted to engage the lugs 79, 79 uponthe bearing plate 80', Fig. 9,- secured upon the inside of the wall 81of the metal housing H carried by or secured to the base 1 and onclosingthe switch and circuit breaker mechanism and its control and operatingparts. The tubular member 73 terminates at the plate 80, but the shaft77 has a bearing in the plate 80 and also in the plate 82 on the outsideof the wall 81. To the free end of the shaft 77, outside the housing H,is secured. by in 83 the operating lever or crank 84 having the handgrip 85. The lever 84 may be locked in neutral or inoperative positlorfby a padlock embracing the lever 84 and extending through the hole 86 inthe member 87 secured to the wall 81, as by the same rivet 88 whichsecures the plate 80.

The housing H has for its front wall the door 89 pivoted at 90 andadapted to be locked closed by a padlock co-acting with the,inember 91.

Carried by and movable with respect to the door 89 is the push rod 92for actuating the rod 93, carried bybracket 94 on the bot.- tom wall ofthe housing H, a spring 95 op- .direction by engagement with theopposite lug 100 guided in a hole in the trip bar structure 34, upwardmovement of the bar 99 raising the tri bar structure.

Sliding vertica ly on the inner side of the 1 door 89 is the indicatingor signal member 101, a portion of which is'viewable through a suitableaperture in the door 89. The member 101 carries the member 102 extendinginwardly into the downward path of travel of the pivot pin 45, whichaccordingly moves the member 101 downwardly, in opposition to spring 103when the circuit breaker structure is moved to circuit closing position.

Due to the aforesaid motion of the mcmher 101, the aspect of the signaldevice through the aperture in the door 89 changes, giving an indicationof the position of the switches;

If an attempt is made to close the door 89 when the switch is in theclosed position, the pin will be found to be disposed in the path ofmember 102 which is carried by member 101, thus preventing closeure ofdoor 89 until the switching mechanism is first tripped open, as bypushing in on rod 93. With the switching mechanism open, the door may beclosed and locked, and the switching mechanism may then be closed bylever 84.

The operation is as follows:

With the parts in circuit closing position as indicated incFig. 1, uponenergization of either or both of the magnet windings 11 to or in excessof predetermined degree, as in the case of over load, either or both ofthe armatures 37 'will be attracted upwardly and engageth'etripping barstructure 34, causing the lugs 33 to engage the tail 29 of the latchactuator 29, causing the same to rotate in clockwise direction, asviewed in Figs. 1 and 7*, its cross piece 30 then engaging the tail 27of latch 27, causing the latch also to rotate in clockwise direction tofree the pin 28, whereupon the switches move in unison to open circuitposition under the influence of gravity or suitable spring means biasingthem toward open circuit position.

Or the structure may be tripped manually by pushing in uponthe rod 92,whereupon the tripping bar structure 34 is similarly actuated throughmember 99 first to actuate the latch actuator 29 and then the latch 27.

To reset or close the switches, the crank or lever 84 is rotated incounter-clockwise direction, as viewed in Figs. 1 and 3, from itsvertical or neutral position, thereby rotating the tubular member 73 andarm 65 in like direction, bringing the latching and engaging face 70 ofmember 65 into position indicated in dotted lines, Fig. 3, engagement,upon subsequent clockwise movement of lever 84, with the lug upon thearm 58, which by its lug'59 causes member 52 to partake of likeclockwise movement about pivot 50, and the attached arm 49 pullsdownwardly upon the link 47, which forces the connecting bar 23*"downwardly and therefore the members 23 of all the switches, causingextension of their toggle structures and movement of their laminatedbridging members 18 toward their stationary contacts 2 and 3. Thismovement is continued until the parts attain'their circuit closingposition as indicated in Fi 1, whereupon the latch 27 again engages pin28 and locks the switching mechanism in circuit closing position.

If, during the closing movement above described, an overload or similarcondition should exist upon the circuit, upon close approach to fulcircuit closing position the circuit will be closed, as at shunt carbons0 and 0 before latch 27 engages and locks the structure. One or both ofthe tripping magnets will then be energized, effecting actuation of thelatch actuator 29, which then causes its roller 32 to press upon thecurved end 61 of the arm 58, in opposition to spring 61, therebyrotating the arm 58 about its pivot 57 on arm 52 and thereby withdrawingthe lug 60 from engagement with the latching-operating face 70 on member65, permitting lug 60 to rotate past member and its face 70, the members58, 52 and 49 rotating counter-clockwise, as viewed in Fig. 3, to dottedline position, while the actuating structure, comprising member 65, isstill held'by the operator in position similar to full line position. ofmember 65 in Fig. 3. This tripping of the arm 58 therefore in cffeetunlatches the actuating mechanism from the switch mechanism, and theswitch mechanism again flies to open circuit position, the operatorbeing unable to close the switching mechanism, due to the aforesaidnon-closable action.

In a struzture of the character herein described, there are, in additionto the op erating means for the movable contact member or structure, aplurality of operating levers, as main operating lever 65 and secondaryoperating lever 52 disengageable therefrom.

The nonclosable circuit breaker mechanism hereinbefore describedcomprises, in effect, a switch or circuit breaker unit and anon-closable unit. connected by the link 47. p The switch or circuitbreaker unit comprises the movable contact member, the operating meanstherefor, and the restraining means. The non-closable unit comprises themembers or main and secondary operating levers 65 and 52 and thedisengageable operating connection between them, whereby when apredetermined electrical condition 4 LILSLQQZ to by the link l7. Suchdetachment of the non-closable structure or unit is desirable oressential when the circuit breaker operating member, as member 44, doesnot rotate about a fixed axis. The member 4A, or the pin 45 thereof,does not move in the arc of a circle about any fixed center, butpartakes of a more complex movement, as curvilinear but non-circular,due to the arrangement of the links 23 and 25. It will be understood,however, that whatever the nature of the operating structure for thecircuit breaker unit, the non-closable unit may be detached therefromand connected thereto by link 47 or equivalent.

What I claim is:

1. Circuit breaker structure comprising the combination with a movableswitch member, of operating means therefor comprising a movable member,an arm pivoted thereon, a latch for locking said switch member in normalposition independently of said arm, an actuating member detached fromand adapted to thrust against said arm to actuate said operating means,and electro-magnetic means controlling said arm to remove it from thepath of said actuating member.

2. Circuit breaker structure comprising the combination with a movableswitch member, of operating means therefor comprising a pivoted member,an arm pivoted thereon, an actuating member adapted to thrust againstsaid arm to actuate said operating means, and electromagnetic meanscontrolling said arm to remove it from the path of said actuating memberto prevent actuation of said switch member upon occurrence of apredetermined electrical con-' dition.

3. Circuit breaker structure comprising the combination with a movableswitch structure, of operating means therefor comprising a movablemember, an arm pivoted on said member and having a lugengaging saidmember for actuating the same, an ac tuating member adapted to engagesaid 'arm and move the same in one direction only to actuate saidoperatingmeans, and electromagnetic means for actuating said arm towithdraw the same from the path of movement of said actuating member.

4:. Circuit breaker structure comprising the combination with a movableswitch member, of operating means therefor comprising a movable member,an arm pivoted on said movable member and having a lug engaging saidmovable member for actuate ing the same, a spring biasing said lugtoward said member, an actuating member adapted to engage said arm andmove the same in one direction only to actuate said operating means, andelectro-magnetic means for actuating said arm to withdraw the same fromthe path of movement of said acuating member'.

5. Circuit breaker structure comprising the combination with a movableswitch member, of operating means therefor comprising a movable member,an arm. pivoted thereon, an actuating member pivoted concentrically withsaid movable member and adapted to thrust against said arm to actuatesaid operating means, and electromagnetic means controlling said arm toremove it from the path of said actuating member.

6. Circuit breaker structure comprising the combination with a movableswitch member, of operating means therefor comprising a movable member,an arm pivoted thereon, an actuating member pivoted concentrically withsaid member and adapted to thrust against said arm to actuate saidoperating means, electro-magnetic means controlling said arm to removeit from the path of said actuating member, and rotary means co-axialwith said actuating member for rotating the same.

7. Circuit breaker structure comprising the combination with a movableswitch member, of operating means therefor comprising a movable member,an arm pivoted thereon, an actuating member pivot ed concentrically withsaid member and adapted to thrust against said arm to actuate saidoperating means, electro-magnetic means controlling said arm to removeit from the path of said actuating member, rotary meansco-axial withsaid actuating member for rotating the same, and means for limiting theextent of rotation of said rotary means.

8. C-ircuit.brcaker structure comprising the combination with a movableswitch member, of operating means therefor comprising a movable member,an arm pivoted thereon, an actuating member adapted to thrust againstsaid arm to actuate said operating means, electro-magnetic meanscontrolling said arm to remove it from the path of said actuatingmember, and a latch controlled by said electro-magnetic means forlocking said movable switch member in normal position.

9. Circuit breaker structure comprising the combination with a movableswitch member, of operating means therefor com prising a movable member,an arm pivoted on said member andhaving a lug engaging said member foractuating the same, an actuating member adapted to engage said arm andmove the same in one member, said arm operable by said latch actuatorfor withdrawing said arm from co-action with said actuating member, andelectro-magnetic means controlling said latch actuator.

11. The combination with a movable contact member of a switch, ofoperating means therefor, an actuating member for actuating saidoperating means and dis engageable therefrom, means for restraining saidcontact member in normal position, electro-responsive means foractuating said. restraining means and for disengaging said operatingmeans from said actuating member, an enclosing housing, means on theexterior of said housing for actuating said actuating member, and meansindependent of said last named actuating means for actuating saidrestraining means and operable from the exterior of said housing.

12. The combination with a movable contact member of a switch, ofoperating means therefor, an actuating member for actuating saidoperating means and disengageable therefrom, means for restraining saidcontact member in normal posi tion, e-leotro-responsive means foractuating said restraining means and for disengaging said operatingmeans from said actuating member, an enclosing housing, means on theexterior of said housing for actuating said actuating member throu h awall of said housing, and means in ependent of said last named actuatingmeans for actuating said restraining means and operable from theexterior of said housing through a different wall thereof.

13. The combination with a movable contact member of a switch, ofoperating means therefor, a rotatable actuating mem ber for actuatingsaid operating means and disengageable therefrom, means for restrainingsaid contact member in normal position, eleotro-responsive means foractuat ng said restraining means and for disengaging said operatingmeans from said actuating member, an enclosing housing, rotatable meanson the exterior of said housing for rotating said actuating member,

and longitudinally movable means operable from the exterior of saidhousin for actuating said restraining means independently of saideleotro-responsive means.

14-. The combination with a movable contact member of a switch, ofoperating means therefona rotatable actuating member for actuating saidoperating means and disengageable therefrom, means for restraining saidcontact member in normal position, electro-responsive means foractuating said restraining means and for disengaging said operatingmeans from said actuating member, an enclosing housing, rotatable meanson the exterior of said housing operative through a wall of said housingfor rotating said actuating member, and longitudinally movable meansoperable from the exterior of said housing through a different wallthereof for actuating said restraining means independently of saidelectro-responsive means.

15. The combination with a movable con= tact member of a switch, ofoperating means therefor, an actuating member for actuating saidoperating means and disengageable therefrom, means for restraining saidcontact member in normal position, electro-responsive means foractuating said restraining means and for disengaging said operatingmeans from said actuating member, an enclosing housing, means on theexterior of said housing for actuating said actuating member through awall of said housing, said housing having a pivoted door, and meansindependent of said last named actuating means carried by said door andoperable from the exterior thereof for actuating said restraining meansindependently of said electro-responsive means.

16. The combination with a movable contact member of a switch, ofoperating means therefor, a rotatable actuating member for. actuatingsaid operating means and disengageable therefrom, means for restrainingsaid contact member in normal position, electro-responsive "means foractuating said restraining means and for disengaging said operatingmeans from said actuating member, an enclosing housing, rotatable meanson the exterior of said housing operative through a wall of said housingfor rotating said actuating member, said housing having a pivoted door,and longitudinally movable means carried by said door and operable fromthe exterior thereof for actuating said restraining means independentlyof said electro-res ponsive means.

17'. The combination with a base, of a contact member of a switchmovable in a plane normal to said base, operating means for said contactmember, an actuating member rotatable about an axis parallel to saidbase for actuating said operating means and disengageable therefrom,electro-responsive means for disengaging said operating means from saidactuating member, an enclosing housing, and rotatable means on theexterior of said housing coaxial with said actuating gieember foractuating said actuating mem- 18. The combination ,with the movablemember of an electric switch, of an operating member therefor, an armpivoted thereto and having a lug engaging said operating member to movethe same in one direction only, an actuating member independent of saidarm for engaging said arm by movement in one direction only to move saidoperating member, and electro-magnetic means for moving said arm in adirection to remove said lug from said operating member and to removesaid arm from the path of said actuating member.

19. The combination with the movable member of an electric switch, of anoperating member therefor, an arm pivoted thereto and having 2. lugengaging said operating member to move the same in one direction only, asecond lug on said arm, an actuating member independent of said arm forengaging said second lug by movement in one direction only to move saidoperating member, an extension on said arm, and electro-magnetic meansfor actuating said extension for withdrawing said second lug from thepath of said actuating member.

20. Circuit breaker structure comprising the combination with a movableswitch member, of operatin means therefor comprising a movable member,an arm pivoted thereon, an actuating member adapted to thrust againstsaid arm to actuate said operating means, andtripping mechanismcomprising a movable member, said arm having a portion extending intothe path of said movable member of said tripping mechanism, whereby saidarm is moved to position in which it is free from said actuating member.21. Circuit breaker structure comprising the combination with a movableswitch member, of operating means therefor comprising a movable member,an arm pivoted thereon, an actuating member adapted to thrust againstsaid arm to actuate said operating means, and tripping mechanismcomprising a movable member, said arm having an arcuate portionextending into the path of said movable member of said trippingmechanism, whereby, said arm is moved to position in which it is freefrom said actuating member.

22. Circuit breaker structure comprising the combination with a movableswitch member, of operating means therefor comprising a movable mem er,an arm'pivoted thereon, an actuating member adapted to thrust againstsaid arm to'. actuate said operating means, and tripping mechanismcomprising a movable member and a roller thereon, said menace means, andtripping mechanism comprising a pivoted member and a roller thereon,said arm having an arcuate portion extending into the path of saidroller, whereby said arm is moved to position in which it is free fromsaid actuating member.

24. Circuit breaker structure comprising the combination with a movablecontact member, of operating means therefor comprising a movable member,an arm pivoted thereon, means for restraining said contact member innormal position independently of said arm, an actuating member movingindependently of said arm and detached therefrom and adapted to thrustagainst said arm to actuate said operating means, and elcctro-magneticmeans controlling said arm to remove it from the path of said actuatingmember. I

25. Circuit breaker structure comprising the combination with a movablecontact member, of operating means therefor comprising a-movable member,an arm pivoted thereon, means for restraining said contact member innormal position independently of said arm, an actuating member moving1n-v dependently of said arm and detached there from and adapted tothrust against said arm to actuate said operating means, andel'ectro-magnetic means for actuating said restraining means and forremoving said arm from the path of said actuating member.

26. Circuit breaker structure comprising the combination with a movablecontact member of a switch, of operating means therefor comprising amovable member, an arm pivoted thereon, means for limiting pivotalmovement of said arm in both directions with respect to said movablemember, an actuating member detached from and adapted to thrust againstsaid arm to move it in one direction to engage and actuate saidoperating means, and electro-magnetic means for actuating said arm inopposite directionto remove it from the path of said actuating member.

27. Circuit breaker structure comprising the combination with a movablecontact 'member of a switch, of operating means therefor comprising amovable member, an arm pivoted thereon, means for limiting pivotalmovement of said arm in both directions with respect to said movablemember, an actuating member detached from and adapted to thrust againstsaid arm to move it in one direction to engage and actuate saidoperating means, electro-magnetic means for actuating said arm inopposite direction to remove it from the path of said actuating member,and means for restraining said contact member in normal position andoperable by said electro-magnetic means.

28. Circuit breaker structure comprising the combination With a movablecontact member of a switch, of a pivoted member for operating the same,an arm pivoted on said operating member and adapted to engage andactuate said operating member, an actuating member pivotedconcentrically with said operating member and detached from and adaptedto thrust against said arm to actuate said operating member, andelectromagnetic means for actuating said arm to remove it from the pathof said actuating member.

29. Circuit breaker mechanism gomprising the combination with a movablecontact member, of operating means therefor comprising a movable member,an arm pivoted thereon, means for restraining said contact member innormal position, an actuating member adapted to thrust against said armto actuate said operating means, an actuator for said restraining means,said arm having a portion extending into the path of said actuatorwhereby said arm is actuated by said actuator to position in which it isfree from said actuating member;

30. Circuit breaker mechanism comprising the combination with a movablecontact member, of operating means therefor comprising a movable member,an arm pivoted thereon, means for restraining said contact member innormal position, an actuating member adapted to thrust against said armto actuate said operating means, an actuator for said restraining means,said arm having a portion extending into the path of said actuatorwhereby said arm is actuated by said actuator to position in which it isfree from said actuating member, and electro-responsive meanscontrolling said arm and said restraining means through said actuator.

31. Circuit breaker mechanism comprising the combination with a movablecontact member, of operating means therefor com-v prising a movablemember, an arm pivoted thereon, a latch for locking said contact memberin normal position, an actuating member adapted to thrust against saidarm to actuate said operating means, a latch actuator, said arm having aportion extending into the path of said actuator whereby said arm isactuated by said actuator to position in which it is free from saidactuating mem- 32. Circuit breaker mechanism comprising the combinationwith a movable contact member of a switch, of a toggle for actuatingsaid contact member, a rotatable member connected to said toggle foractuating said toggle, an arm pivoted on said rotatable member, anactuating member detached from and adapted t thrust against said arm toactuate said toggle through said rotatable member, and electro-magneticmeans for effecting movement of said arm from the path of said actuatingmember.

33. Circuit breaker mechanism comprising the combination with a movablecontact member of a switch, of a toggle for actuating said contactmember, a rotatable member connected to said toggle for actuating saidtoggle, means for restraining said contact member in normal position, anarm pivoted on said rotatable member, an actuating member detached fromand adapted to thrust against said arm to actuate said toggle throughsaid rotatable member, an actuator for actuating" said restraining meansand for efiecting movement or said arm from the path of said actuatingmember, and electro-responsive means controlling said actuator.

34:. The combination with a movable contact member of a switch, ofoperating and restraining means therefor, an actuating member foractuating said operating means and disengageable therefrom,electro-responsive means for effecting actuation of said restrainingmeans and disengagement of said operating means from said actuatingmember, an enclosing housing, means carried by said housing and operablefrom the exterior of said housing for actuating said actuating member,and manual tripping means carried by said housing and operable from theexterior thereof independently of said actuating means for tripping saidcon tact member.

35. The combination with a movable contact member of a switch, ofoperating and restraining means therefor, an actuating member foractuating said operating means and disengageable therefrom,electro-responsive means for effecting actuation of said restrainingmeans and disengagement of said operating means from said actuatingmember, an enclosing housing, means carried by said housing and operablefrom the exterior of said housing for actuating said actuating member,and manual tripping means carried by said housing in detached relationto said restraining means and operable from the exterior thereofindependently of said actuating means for tripping said contact member.

36. The combination with a switch unit comprising a movable contactmember and operating and restraining means therefor, of a non-closableunit comprising an actuated member, an actuating member for actuatingsaid actuated member and disengageable therefrom, means connecting saidactuated member with saidoperating means of said switch unit, andelectro-responsive means for effecting actuation of said restrainingmeans and for effecting disengagement of said actuating member from saidactuated member.

37. The combination with a switch unit comprising a movable contactmember and operating and restraining means therefor, of a non-closableunit comprising an actuated member, an actuating member for actuatingsaid actuated member and disengageable therefrom, a link pivoted to saidactuated member and to said operating means of said switch unit, andelectro-responsive means for effecting actuation of said restrainingmeans and for effecting disengagement of said actuating member from saidactuated member.

38. The combination with a switch unit comprising a movable contactmember and operating and restraining means therefor, said operatingmeans comprising an operating member movable in'a non-circularcurvilinear path, of a non-closable unit comprising an actuated member,an actuating member for actuating said actuated member and disengageabletherefrom, means connecting said actuated member with said operatingmember of said switch unit, and electro-responsive means for effectingactuation of said restraining means and for effecting disengagement ofsaid actuating member from said actuated member.

39. The combination with a switch unit comprising a movable contactmember and operating and restraining means therefor, said operatingmeans comprising an operating member movable in a non-circularcurvilinear path, of a nonclosable unit comprising an actuated member,,an actuating member for actuating said actuated member anddisenga-geable therefrom, a link pivoted to said actuated member and tosaid operating member of said switch unit, and electro-responsive meansfor effecting actuation of said restraining means and for effectingdisengagement of said actuating member from said. actuated member.

40. The combination with a switch unit comprising a movable contact"member and operating and restraining means therefor, of a non-closableunit detached from said sWitch unit comprising an actuated member, anactuating member for actuating said actuated member and disengageabletherefrom, means connecting said actuated member with said operatingmeans of said switch unit, and electro-responsive means for effectingactuation of said restraining means and for effecting disengagement ofsaid actuating member from said actuated member.

41. The combination with a switch unit comprising a movable contactmember and operating and restraining means therefor, of a non-closableunit comprising an actuated member, an actuating member for actuatingsaid actuated member and disengageable therefrom, means connecting saidactuated member with said operating means of said switch unit,electro-responsive means for effecting actuation of said restrainingmeans and for effecting disengagement of said actuating member from saidactuated member, a housing enclosing said switch and non-closable units,and means carried by said housing on the exterior thereof forcontrolling said actuating member.

42. The combination with a switch unit comp-rising a movable contactmember and operating and restraining means therefor, of a non-closableunit comprising anactuated member, an actuating member for actuatingsaid actuated member and disengageable therefrom, a link pivoted to saidactuated member and to said operating means of said switch unit,electro-responsive means for effecting actuation of said restrainingmeans and for eifecting disengagement of said actuating member from saidactuated member, a housing enclosing said switch and non-closable units,and means carried by said housing on the exterior thereof forcontrolling said actuating, member.

4:3. The combination with a switch unit comprising a movable contactmember locked in normal position, a toggle link pivoted to ,said contactmember, a second toggle link pivoted to said' toggle link and to a fixedmember, of a non-closable unit comprising an actuated member, anactuating member for actuating said actuated member and disengageabletherefrom, a link pivoted to said actuated member and to said firstnamed link of said switch unit, and electro-responsive means forunlocking said contact member and for effecting disengagement of saidactuating member from said actuated member.

4A. The combination with a switch unit comprising a movable contactmember and operating and restraining means therefor, of a non-closableunit comprising an actuated member, an actuating member for actuatingsaid actuated member and disengageable therefrom, a link connecting saidactuated member with said operating means of said switch unit, and meansfor effecting disengagement of said actuated member from said actuatingmember comprising coacting members one of which has an elongated arcuatesurface disposed adjacent to and adapted to engage with the other, andelectro-responsive means for controlling said restraining means and foreffecting engager eer eee g ment of saici (Bo-acting members disengageabie connection betyveen said operating 1esaid actuated member from saidactuating vers, and; a pivotal operating connection w member. betweensaid. secondary operating lever and 45. Circuit breaker mechanismoomprissaid toggie.

5 ing a movable contact member, a plural link in testimony whereof Ihave hereunto toggle co-actin with said contact member afiixedl mysignature this 19" day of May, for operating t e same, main andsecondary 1929. operating levers, means forming a detach- WILLIAM M.SCQTT.

